DS2792G+T&R

DS2792G+T&R Datasheet

Part	Datasheet
DS2792G+T&R	DS2792G+T&R (pdf)

Related Parts	Information
DS2792G+	DS2792G+

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The DS2792 provides a user-programmable fuel gauge solution for Li-Ion and NiMH chemistry battery packs. A low-power, 16-bit MAXQ20 microcontroller with generous program and data memory, combined with an accurate measurement system for battery current, voltage, and temperature provide the ideal platform for customized fuel-gauge algorithms. EEPROM data memory supports nonvolatile NV in-pack storage of charge parameters, cell characteristics, usage history, and manufacturing/lot tracking data. Digital Video Cameras SLR Digital Still Cameras Subnotebook PCs and Ultra-Portable PCs Industrial PDAs, Handheld Computers, and GPS FUNCTIONAL DIAGRAM MAXQ is a registered trademark of Maxim Integrated Products, Inc. DS2792 Programmable Fuel Gauge with UART Interface Accurate Current Measurement for Coulomb Counting Current Accumulation ±4µV Over ±64mV Input Range ±267µA Over ±4.2A Range Using an External 15m Series Resistor High-Resolution Current Reporting 12-Bit + Sign Average Every 0.88ms 15-Bit + Sign Average Every 2.8s Three Voltage Measurement Sources 10-Bit Average from VIN1, and Vx Inputs Temperature Measurement 10-Bit Using On-Chip Sensor Ratiometric Input for External Thermistor Vx 16-Bit MAXQ20 Low-Power Microcontroller Efficient C-Language Programming 8k Words Total Program Memory 4k Words EEPROM Program Memory 4k Words ROM Program Memory 64 Words Data EEPROM 256 Words Data RAM Password-Protected Programming On-Chip, Low Drop-Out Regulator 2.5V to 10V Operating Range SHA-1 Hash Algorithm in ROM 19.2kbps UART Interface Internal Oscillator No Crystal Required Low-Power Consumption 1.5mA CPU Mode 1MHz , 145µA ANALOG Mode, 50µA SLEEP Mode ORDERING INFORMATION PART TEMP RANGE PIN-PACKAGE DS2792G+ -20ºC to +70ºC TDFN-28 + Denotes lead-free package. Contact factory concerning Mask ROM devices. Pin Configuration appears at end of data sheet. 1 of 40 DS2792 Programmable Fuel Gauge with UART Interface ABSOLUTE MAXIMUM RATINGS VDD, VIN2 to -0.3V to +12V P0.4, P0.5 to -0.3V to VB +0.3V AVSS to VSS -0.3V to +0.3V All Other Pins to VSS -0.3V to +6V TXD, Continous Sink Current Each, 50mA Total Operating Temperature to +85ºC Storage Temperature Range to +125ºC Soldering Temperature IPC/JEDEC J-STD-020 Specification Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyone those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device. RECOMMENDED DC OPERATING CHARACTERISTICS VDD = 2.5V to 10V, TA = -20°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C, VDD = 5.0V. PARAMETER CONDITIONS Supply Voltage Range VIN1, TXD, RXD, SNS1, SNS2 Voltage Range: Voltage Range VIN2 Note 1 Note 1 Note 1 Note 1 +10 VB + +10 Voltage Range Vx Output Voltage VB Note 1 VDD > 3.5V, IO = 2mA, Note 1 UNITS V ELECTRICAL CHARACTERISTICS VDD = 2.5V to 10V, TA = -20°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C, VDD = 5.0V. PARAMETER CONDITIONS Supply Current Power-On Reset Threshold Brownout Threshold Regulator Drop-Out Current Measurement Input Range Current Measurement Resolution Current Measurement Gain Error Current Measurement Offset Error Accumulated Current Range Accumulated Current Resolution Accumulated Current Offset Temperature Measurement Range Temperature Measurement LSb Temperature Measrement Error ISLEEP ISUSP IANALOG ICPU VRESET VBO VDO:VB IFS ILSB IGERR IOERR qFS qLSB

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The DS2792 provides a user-programmable fuel gauge solution for Li-Ion and NiMH chemistry battery packs. A low-power, 16-bit MAXQ20 microcontroller with generous program and data memory, combined with an accurate measurement system for battery current, voltage, and temperature provide the ideal platform for customized fuel-gauge algorithms. EEPROM data memory supports nonvolatile NV in-pack storage of charge parameters, cell characteristics, usage history, and manufacturing/lot tracking data.

Digital Video Cameras SLR Digital Still Cameras Subnotebook PCs and Ultra-Portable PCs Industrial PDAs, Handheld Computers, and GPS

FUNCTIONAL DIAGRAM

MAXQ is a registered trademark of Maxim Integrated Products, Inc.

DS2792 Programmable Fuel Gauge
with UART Interface

Accurate Current Measurement for Coulomb Counting Current Accumulation ±4µV Over ±64mV Input Range ±267µA Over ±4.2A Range Using an External 15m Series Resistor

High-Resolution Current Reporting 12-Bit + Sign Average Every 0.88ms 15-Bit + Sign Average Every 2.8s

Three Voltage Measurement Sources 10-Bit Average from VIN1, and Vx Inputs

Temperature Measurement 10-Bit Using On-Chip Sensor Ratiometric Input for External Thermistor Vx
16-Bit MAXQ20 Low-Power Microcontroller Efficient C-Language Programming 8k Words Total Program Memory 4k Words EEPROM Program Memory 4k Words ROM Program Memory 64 Words Data EEPROM 256 Words Data RAM

Password-Protected Programming On-Chip, Low Drop-Out Regulator
2.5V to 10V Operating Range SHA-1 Hash Algorithm in ROM 19.2kbps UART Interface Internal Oscillator No Crystal Required Low-Power Consumption
1.5mA CPU Mode 1MHz , 145µA ANALOG Mode, 50µA SLEEP Mode
ORDERING INFORMATION

PART

TEMP RANGE

PIN-PACKAGE

DS2792G+ -20ºC to +70ºC TDFN-28
+ Denotes lead-free package. Contact factory concerning Mask ROM devices.

Pin Configuration appears at end of data sheet.
1 of 40

DS2792 Programmable Fuel Gauge with UART Interface

ABSOLUTE MAXIMUM RATINGS

VDD, VIN2 to -0.3V to +12V P0.4, P0.5 to -0.3V to VB +0.3V AVSS to VSS -0.3V to +0.3V All Other Pins to VSS -0.3V to +6V TXD, Continous Sink Current Each, 50mA Total Operating Temperature to +85ºC Storage Temperature Range to +125ºC Soldering Temperature IPC/JEDEC J-STD-020 Specification

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyone those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device.

RECOMMENDED DC OPERATING CHARACTERISTICS

VDD = 2.5V to 10V, TA = -20°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C, VDD = 5.0V.

PARAMETER

CONDITIONS

Supply Voltage Range VIN1, TXD, RXD, SNS1, SNS2 Voltage Range:

Voltage Range VIN2

Note 1

Note 1

Note 1 Note 1
+10 VB + +10

Voltage Range Vx Output Voltage VB

Note 1

VDD > 3.5V, IO = 2mA, Note 1

UNITS V

ELECTRICAL CHARACTERISTICS

VDD = 2.5V to 10V, TA = -20°C to +70°C, unless otherwise noted. Typical values are at TA = +25°C, VDD = 5.0V.

PARAMETER

CONDITIONS

Supply Current

Power-On Reset Threshold Brownout Threshold Regulator Drop-Out Current Measurement Input Range Current Measurement Resolution Current Measurement Gain Error

Current Measurement Offset Error Accumulated Current Range Accumulated Current Resolution

Accumulated Current Offset

Temperature Measurement Range Temperature Measurement LSb Temperature Measrement Error

ISLEEP

ISUSP

IANALOG

ICPU VRESET

VBO VDO:VB

IFS ILSB IGERR IOERR qFS qLSB

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Datasheet ID: DS2792G+T&R 508399